Knob and rosette attachment



(No Model.) F. J. HARPER. l

KNOB AND ROSBTTE ATTACHMENT.

Patented Oct. 17, 1882.

UNITED STATES PATENT OFFICE.

FRANCIS J. HARPER, OF NORVVICH, CONNECTICUT.

KNOB AND ROSETTE ATTACHMENT.

SPECIFICATION forming part of Letters Patent No. 266,033, dated October 17, 1882.

Application lcd May 17, 1882.

To all whom it may concern Be it known that I, FRANCIs'J. HARPER, of the city ot' Norwich, county of New London, and State of Connecticut, have invented certain new and useful Improvements in Knob and Rosette Fasteners, which improvements are fully set forth and described in the following specification, reference 'being had to the accompanying drawings.

My immediate object is to produce a fastener which shall be strong in its parts, cheaply constructed, and easily applied to doors of ordinary thickness.

My device does not require a lock or latch made specially for it, but may be used with locks as commonly constructed.

In the accompanying drawings, Figure l shows my device as applied to a door mortised to receive the lock.

A represents a common porcelain or earthen knob, with a metallic neck, B, said neck having through its center a square, oblong, or dia mond-shaped opening to receive the stem or spindle which operates the latch.

C is a rosette, ot' metal or other suitable material, which is fastened rigidly to the door, and has on its outer side a sleeve or collar, in which the knob-neck enters when in use.

Fig. 2 is a front view of the rosette C. Fig. 3 is an end view of the knob-neck B. Fig. 4 shows nuts with which screws c e engage; and

Fig. 5 shows another construction, in which the screws engage with a plate having 'end studs.

My device may he used on one or both sides of the door. y

There have been made heretofore various devices for securing to the door the knob and rosette. In nearly all such devices the rosette has been fastened to the door by small woodscrews. These screws, having but a slight hold in the wood, invariably work loose in a short time. The almost universal method of connect-ing knobs on opposite sides of the door lis by means of a square rod or spindle, which passes through the latch, and is secured in the knob-neck by a set-screw. This screw, (like those above referred to in the rosette,) by the (No model.)

constant jarring of the door and working of the knob, soon becomes loose.

My device is designed to overcome these objections by fastening securely both the rosette and knob.

My rosette is held in place on the door by the metal nuts b b (see also Fig. 4) and the screws e e. The nuts b b are inserted from the mortise, and are met by the screws c e,

which pass through the rosette and'into Z) b.

These screws, having a rm hold in the metal nuts b b, keep the rosette always in its proper place.

Instead of the nuts b b, a single piece may be used, as shown in Fig. 5, in which D represents-a thin metallic plate, having at each end studs ff, drilled and tapped to -receive the screws ec. When a single lpiece is used the base or plate is provided with a circular opening, through which the connecting spindle passes, (see h, Fig. 5.)

On the end of the knob-neck B are one or more lugs, et a., which, when the neck B is inserted in the collar or sleeve of the rosette C, enter and pass through corresponding slots in the rosette, (see c c, Fig. 2.) The lugs a a., after passing through the slots c c, are, by a one-half turn ot' the knob-neck, locked in the rosette.

My device is applied to a door as follows; After boring the customary hole for the square spindle, fasten the rosette on one side of the door by means of the nuts b b or plate D and screws c c, as before described. Insert the knob-neck in the rosette so fastened, giving the knob one-half of a turn in either direction. Then assemble the knob-neck, spindle, and rosette on the other side before fastening the rosette. Place the nuts b b or plate D in position Pass the spindle E through the latch and into the knob-neck already fastened, when the rosette will come to its proper place against the door. Turn the rosette until the screwholes register with the nuts b b or studs ff in plate D. Insert and set up the screws e e, and the knobs are ready for use.

To prevent the spindle E from sliding or working loosely in the knob-neck, I place a iight spiral spring (see d, Fig. l) in one or 2. In combination with the knob-shank B ro both ofthe necks before inserting,1 the spindle. and spindle E, the spiral spring d, as and for These springs tend to keep the spindle in a centhe purpose specified. trai position, and prevent its rattling.

I claim- FRANCIS J. HARPER. 1. 'In combination with the knob-shank B I and rosette C, the fastening-plate D, having Witnesses: projections f .f and screws e e, as described, WILLIS W. CLARKE, and. for the purpose specified. FRANK H. ALLEN. 

